Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Common mode feedback circuit, corresponding signal processing circuit and method

A common-mode feedback and common-mode voltage technology, which is applied to electrical components, amplifiers with semiconductor devices/discharge tubes, parts of amplifiers, etc., can solve problems such as the limitation of the output signal swing of operational amplifiers

Active Publication Date: 2019-06-18
STMICROELECTRONICS SRL
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With decreasing supply voltages, the op amp output signal swing can experience severe limitation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Common mode feedback circuit, corresponding signal processing circuit and method
  • Common mode feedback circuit, corresponding signal processing circuit and method
  • Common mode feedback circuit, corresponding signal processing circuit and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] In the ensuing description, various specific details are set forth in order to provide a thorough understanding of various examples of embodiments. Embodiments may be obtained without one or more of the specific details, or with other methods, components, materials, etc. In other instances, known structures, materials, or operations are not detailed or described so as not to obscure various aspects of the embodiments.

[0023] References to "an embodiment" or "one embodiment" within the framework of this specification are intended to indicate that a particular configuration, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, phrases such as "in an embodiment" or "in one embodiment," which may be present at various points in this specification, do not necessarily refer to the same embodiment. Furthermore, particular conformations, structures or properties may be combined in any suitable manner in one or ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

For use in, for example, operational amplifiers (op amps), including those with differential input terminals (V in + ,V in ‑ ) with a transconductance input stage (10) and a differential output terminal (V out + ,V out ‑) for cascaded frequency compensation (C C1 ,C C2 ) In an embodiment of the common-mode feedback circuit of the gain stage (14), the common-mode feedback loop (R1, R2, Q A ,Q B ,12,16) are provided to include comparators (Q A ,Q B ), the comparator is used to pass the indication at the differential output terminal (V out + ,V out ‑) sensed common-mode voltage level (V CM ) of the common-mode sense signal (C) to the reference (V REF ) to generate a feedback error signal for the transconductance input stage (10). The common-mode feedback loop consists of converters (R1, R2) for converting the output voltage at the differential output terminals (V out + ,V out ‑) sensed common-mode voltage level (V CM ) into a feed to the comparator (Q A ,Q B ) current signal.

Description

technical field [0001] This specification deals with electronic circuits. [0002] One or more embodiments may be applied to common mode feedback circuits for use in differential amplifiers, for example. Background technique [0003] Operational amplifiers (op amps) are useful and versatile building blocks in analog signal processing circuits. [0004] With decreasing supply voltages, op amp output signal swings can experience severe limitation. [0005] One possible solution to increase output swing is to use a fully differential op amp topology, which also improves power supply noise / interference rejection. However, a fully differential structure may involve additional circuitry, namely a common-mode feedback (CMFB) circuit for setting the common-mode voltage at different high-impedance nodes not stabilized by the negative differential feedback. Contents of the invention [0006] There is still a felt need for improved common mode feedback circuits for use in differen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/26H03F3/45
CPCH03F1/083H03F3/45085H03F3/45502H03F3/45511H03F2200/456H03F2203/45008H03F2203/45418H03F2203/45424H03F2203/45431H03F1/086H03F1/0205H03F3/45179H03F2203/45116H03F2203/45288
Inventor F·卡拉拉F·托里西F·克莱里奇
Owner STMICROELECTRONICS SRL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com